What magic inspired the world's greatest playwright?

Life has been good to Shakespeare, now the preeminent playwright of his time since the mysterious death of Christopher Marlowe. In his heart, he knows that his past contact with the Elven king Quicksilver sparked his talent and changed him forever-but it came at too high a cost. Then word is brought to him from Stratford that his son has disappeared, lost in the forest where Quicksilver reigns. Ablaze with anger, Will ventures once more into the realm of the unnatural, determined to wrest the boy from the Elven king's clutches. But he finds that Quicksilver is not the culprit. Now he must face an inhuman being of dark power to save not only his son, but all the realm of magic...